What is your oil pressure at idle and cruise when engine is at normal operating temp? No need to nit pick the psi numbers or mileage I am just trying to get a general idea of what might be normal for these engines.

 

you have failed at the internet

edit: success!!!

 

Hot idle in tracffic is between 15 and 20. At cruise speeds samewhwere around 30psi and high rpm is 45psi or so. I do have high mileage and I'm not sure this is normal. It seems a little low to me.

 

Mine is in this range also.I was wondering if this is low enough to cause some valvetrain noise at idle or is it just high mileage lifters that need to be replaced. I have built some Gen I small blocks in the past and they all seemed to be a lot quieter than these LT1's.

 

Idle: 20
Cruise: 40
WOT: 60

Anything below 15-20 is considered unusual, even though the specs say it can be as low as 6 psi at idle...

If you've got a high mileage engine with worn bearings that is still in pretty good condition, running a slightly thicker oil isn't a bad idea. Something like 10W-40 would probably be good.

 

My friend's 94 T/A M6 gets about 40, maybe 45ish at cruise, around 55 at WOT, and 30psi idle (900 rpm idle though) on a 120k LT1 with 10w30 dino oil.

Jason

 

30 psi at idle and 50 psi at crusing speed for me

 

20-40 here.

 

Mine doesn't fit. It's more like 20-50.

 

I installed a new oil pump and it's around 15-20 at idle and 30-40 around idle and WOT is around 40-50 and sometimes lower. It just depends on what the RPM is.

 

cold start up according to the guage (who knows how accurate it is) it sits at about ~45psi
warm/hot idle and cruise its just under 20psi
WOT it jumps up too about 50psi

thats all how the car is now
when it was stock, cold was about 60psi, warm/hot was about 40psi all the time WOT was 60+

 

How many miles now?
I'm up to 148,000 on the clock. I'm the 3rd owner and it has all ways been at these pressure levels. I think when I install my hotcam, Igoing to pull the pan. Check the bearings and replace the oil pump with a white spring. If the bearings or in poor shape, then they will need replacing as well, I guess.

 

86k

 

Can't be answered as the question is posed. Idle and cruise are completely different rpm. What are you asking for? How about two questions: pressure at idle (with idle speed stated) and pressure at a specificed cruise rpm?

Rich

 

20 at idle and about 43 at curise......but thats using 20w 50 oil b/c my motor is dying!!!!